I really think they messed up here- I agree, she doesn’t seem to have chemistry with any romantic interest except David, and that’s probably due to how fond/comfortable the actors are of each other. I know Johnny was on BBT and probably didn’t want another series, but I’m still scratching my head at what they did with these characters. Ben is a good character and the actor is funny but there is no chemistry there at all. Hell she has better chemistry with DJ.
They have made Harris a more likeable character, I think they next need to work on Darlene. I remember when the reboot first happened (with Roseanne) and I was surprised at how sweet she was, but still sharp and funny. I miss that version of the character.